citrus_esdb.c revision 1.2
1 /* $NetBSD: citrus_esdb.c,v 1.2 2003/07/16 08:05:27 itojun Exp $ */ 2 3 /*- 4 * Copyright (c)2003 Citrus Project, 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 #if defined(LIBC_SCCS) && !defined(lint) 31 __RCSID("$NetBSD: citrus_esdb.c,v 1.2 2003/07/16 08:05:27 itojun Exp $"); 32 #endif /* LIBC_SCCS and not lint */ 33 34 #include "namespace.h" 35 #include <assert.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <errno.h> 40 #include <limits.h> 41 #include <paths.h> 42 #include <sys/types.h> 43 44 #include "citrus_namespace.h" 45 #include "citrus_types.h" 46 #include "citrus_bcs.h" 47 #include "citrus_region.h" 48 #include "citrus_memstream.h" 49 #include "citrus_mmap.h" 50 #include "citrus_lookup.h" 51 #include "citrus_db.h" 52 #include "citrus_db_hash.h" 53 #include "citrus_esdb.h" 54 #include "citrus_esdb_file.h" 55 56 #define ESDB_DIR "esdb.dir" 57 #define ESDB_ALIAS "esdb.alias" 58 59 /* 60 * _citrus_esdb_alias: 61 * resolve encoding scheme name aliases. 62 */ 63 const char * 64 _citrus_esdb_alias(const char *esname, char *buf, size_t bufsize) 65 { 66 return _lookup_alias(_PATH_ESDB "/" ESDB_ALIAS, esname, buf, bufsize); 67 } 68 69 70 /* 71 * conv_esdb: 72 * external representation -> local structure. 73 */ 74 static int 75 conv_esdb(struct _citrus_esdb *esdb, struct _region *fr) 76 { 77 int ret; 78 struct _citrus_db *db; 79 u_int32_t version, num_charsets, csid, i, tmp; 80 char buf[100]; 81 const char *str; 82 83 /* open db */ 84 ret = _db_open(&db, fr, _CITRUS_ESDB_MAGIC, &_db_hash_std, NULL); 85 if (ret) 86 goto err0; 87 88 /* check version */ 89 ret = _db_lookup32_by_s(db, _CITRUS_ESDB_SYM_VERSION, &version, NULL); 90 if (ret) 91 goto err1; 92 switch (version) { 93 case 0x00000001: 94 /* current version */ 95 /* initial version */ 96 break; 97 default: 98 ret = EFTYPE; 99 goto err1; 100 } 101 102 /* get encoding/variable */ 103 ret = _db_lookupstr_by_s(db, _CITRUS_ESDB_SYM_ENCODING, &str, NULL); 104 if (ret) 105 goto err1; 106 esdb->db_encname = strdup(str); 107 if (esdb->db_encname == NULL) { 108 ret = errno; 109 goto err1; 110 } 111 112 esdb->db_len_variable = 0; 113 esdb->db_variable = NULL; 114 ret = _db_lookupstr_by_s(db, _CITRUS_ESDB_SYM_VARIABLE, &str, NULL); 115 if (ret==0) { 116 esdb->db_len_variable = strlen(str)+1; 117 esdb->db_variable = strdup(str); 118 if (esdb->db_variable == NULL) { 119 ret = errno; 120 goto err2; 121 } 122 } else if (ret != ENOENT) 123 goto err2; 124 125 /* get number of charsets */ 126 ret = _db_lookup32_by_s(db, _CITRUS_ESDB_SYM_NUM_CHARSETS, 127 &num_charsets, NULL); 128 if (ret) 129 goto err3; 130 esdb->db_num_charsets = num_charsets; 131 132 /* get invalid character */ 133 ret = _db_lookup32_by_s(db, _CITRUS_ESDB_SYM_INVALID, &tmp, NULL); 134 if (ret==0) { 135 esdb->db_use_invalid = 1; 136 esdb->db_invalid = tmp; 137 } else if (ret == ENOENT) 138 esdb->db_use_invalid = 0; 139 else 140 goto err3; 141 142 /* get charsets */ 143 esdb->db_charsets = malloc(num_charsets * sizeof(*esdb->db_charsets)); 144 if (esdb->db_charsets == NULL) { 145 ret = errno; 146 goto err3; 147 } 148 for (i=0; i<num_charsets; i++) { 149 snprintf(buf, sizeof(buf), 150 _CITRUS_ESDB_SYM_CSID_PREFIX "%d", i); 151 ret = _db_lookup32_by_s(db, buf, &csid, NULL); 152 if (ret) 153 goto err4; 154 esdb->db_charsets[i].ec_csid = csid; 155 156 snprintf(buf, sizeof(buf), 157 _CITRUS_ESDB_SYM_CSNAME_PREFIX "%d", i); 158 ret = _db_lookupstr_by_s(db, buf, &str, NULL); 159 if (ret) 160 goto err4; 161 esdb->db_charsets[i].ec_csname = strdup(str); 162 if (esdb->db_charsets[i].ec_csname == NULL) { 163 ret = errno; 164 goto err4; 165 } 166 } 167 168 _db_close(db); 169 return 0; 170 171 err4: 172 for (; i>0; i--) 173 free(esdb->db_charsets[i-1].ec_csname); 174 free(esdb->db_charsets); 175 err3: 176 free(esdb->db_variable); 177 err2: 178 free(esdb->db_encname); 179 err1: 180 _db_close(db); 181 if (ret == ENOENT) 182 ret = EFTYPE; 183 err0: 184 return ret; 185 } 186 187 /* 188 * _citrus_esdb_open: 189 * open an ESDB file. 190 */ 191 int 192 _citrus_esdb_open(struct _citrus_esdb *db, const char *esname) 193 { 194 int ret; 195 const char *realname, *encfile; 196 char buf1[PATH_MAX], buf2[PATH_MAX], path[PATH_MAX]; 197 struct _region fr; 198 199 _DIAGASSERT(esname != NULL); 200 201 snprintf(path, sizeof(path), "%s/%s", _PATH_ESDB, ESDB_ALIAS); 202 realname = _lookup_alias(path, esname, buf1, sizeof(buf1)); 203 204 snprintf(path, sizeof(path), "%s/%s", _PATH_ESDB, ESDB_DIR); 205 encfile = _lookup_simple(path, realname, buf2, sizeof(buf2)); 206 if (encfile==NULL) 207 return ENOENT; 208 209 /* open file */ 210 snprintf(path, sizeof(path), "%s/%s", _PATH_ESDB, encfile); 211 ret = _map_file(&fr, path); 212 if (ret) 213 return ret; 214 215 ret = conv_esdb(db, &fr); 216 217 _unmap_file(&fr); 218 219 return ret; 220 } 221 222 /* 223 * _citrus_esdb_close: 224 * free an ESDB. 225 */ 226 void 227 _citrus_esdb_close(struct _citrus_esdb *db) 228 { 229 int i; 230 231 _DIAGASSERT(db != NULL); 232 _DIAGASSERT(db->db_num_charsets == 0 || db->db_charsets != NULL); 233 234 for (i=0; i<db->db_num_charsets; i++) 235 free(db->db_charsets[i].ec_csname); 236 db->db_num_charsets = 0; 237 free(db->db_charsets); db->db_charsets = NULL; 238 free(db->db_encname); db->db_encname = NULL; 239 db->db_len_variable = 0; 240 free(db->db_variable); db->db_variable = NULL; 241 } 242 243 /* 244 * _citrus_esdb_free_list: 245 * free the list. 246 */ 247 void 248 _citrus_esdb_free_list(char **list, size_t num) 249 { 250 size_t i; 251 252 for (i=0; i<num; i++) 253 free(list[i]); 254 free(list); 255 } 256 257 /* 258 * _citrus_esdb_get_list: 259 * get esdb entries. 260 */ 261 int 262 _citrus_esdb_get_list(char ***rlist, size_t *rnum) 263 { 264 int ret; 265 struct _region key; 266 size_t num; 267 struct _citrus_lookup *cla, *cld; 268 char **list; 269 char buf[PATH_MAX]; 270 271 num = 0; 272 273 ret = _lookup_seq_open(&cla, _PATH_ESDB "/" ESDB_ALIAS); 274 if (ret) 275 goto quit0; 276 277 ret = _lookup_seq_open(&cld, _PATH_ESDB "/" ESDB_DIR); 278 if (ret) 279 goto quit1; 280 281 /* count number of entries */ 282 num = _lookup_get_num_entries(cla) + _lookup_get_num_entries(cld); 283 284 _lookup_seq_rewind(cla); 285 _lookup_seq_rewind(cld); 286 287 /* allocate list pointer space */ 288 list = malloc(num * sizeof(char *)); 289 num=0; 290 if (list == NULL) { 291 ret = errno; 292 goto quit3; 293 } 294 295 /* get alias entries */ 296 while ((ret = _lookup_seq_next(cla, &key, NULL)) == 0) { 297 snprintf(buf, sizeof(buf), "%.*s", 298 (int)_region_size(&key), 299 (const char *)_region_head(&key)); 300 _bcs_convert_to_lower(buf); 301 list[num] = strdup(buf); 302 if (list[num] == NULL) { 303 ret = errno; 304 goto quit3; 305 } 306 num++; 307 } 308 if (ret != ENOENT) 309 goto quit3; 310 /* get dir entries */ 311 while ((ret = _lookup_seq_next(cld, &key, NULL)) == 0) { 312 /* check duplicated entry */ 313 snprintf(buf, sizeof(buf), "%.*s", 314 (int)_region_size(&key), 315 (const char *)_region_head(&key)); 316 _bcs_convert_to_lower(buf); 317 ret = _lookup_seq_lookup(cla, buf, NULL); 318 if (ret) { 319 if (ret != ENOENT) 320 goto quit3; 321 /* not duplicated */ 322 list[num] = strdup(buf); 323 if (list[num] == NULL) { 324 ret = errno; 325 goto quit3; 326 } 327 num++; 328 } 329 } 330 if (ret != ENOENT) 331 goto quit3; 332 333 ret = 0; 334 list = realloc(list, num*sizeof(char *)); 335 *rlist = list; 336 *rnum = num; 337 quit3: 338 if (ret) 339 _citrus_esdb_free_list(list, num); 340 _lookup_seq_close(cld); 341 quit1: 342 _lookup_seq_close(cla); 343 quit0: 344 return ret; 345 } 346
Indexes created Mon Sep 29 21:09:56 GMT 2025